It triggers on the openssl headers, and doesn't seem to actually help us.
@@ -1710,7 +1710,6 @@ if test "x$enable_gcc_warnings_advisory" != "xno"; then
-Wbool-conversion
-Wbool-conversions
-Wbuiltin-requires-header
- -Wc99-c11-compat
-Wchar-align
-Wcompare-distinct-pointer-types
-Wcomplex-component-init
Nick Mathewson